---
id: 5900f5191000cf542c51002b
challengeType: 5
title: 'Problem 428: Necklace of Circles'
videoUrl: ''
localeTitle: ''
---

## Description
undefined

## Instructions
undefined

## Tests
<section id='tests'>

```yml
tests:
  - text: ''
    testString: 'assert.strictEqual(necklace(1000000000), 747215561862, "<code>necklace(1000000000)</code> should return 747215561862.");'

```

</section>

## Challenge Seed
<section id='challengeSeed'>

<div id='js-seed'>

```js
function necklace(n) {
  // Good luck!
  return true;
}

necklace(1000000000)

```

</div>



</section>

## Solution
<section id='solution'>

```js
// solution required
```
</section>